›› 2016, Vol. 37 ›› Issue (12): 3561-3568.doi: 10.16285/j.rsm.2016.12.027

• Geotechnical Engineering • Previous Articles     Next Articles

Effect of nearby undercrossing tunneling on the deformation of existing metro tunnel and construction control

ZHANG Qiong-fang1, 2, XIA Tang-dai1, 2, DING Zhi3, HUANG Xiao-bin4, LIN Cun-gang5   

  1. 1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China; 2. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China; 3. Department of Civil Engineering, Zhejiang University City College, Hangzhou, Zhejiang 310015, China; 4. Hangzhou Hanggang Metro Co., Ltd., Hangzhou, Zhejiang 310017, China; 5. College of Civil, Construction and Environmental Engineering, Ningbo University, Ningbo, Zhejiang 315211, China
  • Received:2014-12-30 Online:2016-12-10 Published:2018-06-09
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (NSFC) (51508506), the Open Fund for Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education of Tongji University (KLE-TJGE-B1402) and the Project Foundation of Hangzhou (20160533B94).

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Abstract: Construction process of shield undercrossing the existing metro tunnel No.1 is monitored. Based on monitored data, the heave/subsidence, horizontal and convergence displacement of the existing tunnel structure are analyzed with the change of the relative position of the shield machine to the existing tunnel. Shield driving parameters have been recorded during the tunneling process. The parameters of shield machine are optimized further through the feedback of line 1 monitoring results, and the existing tunnel deformation is controlled within the permitted value according to the reasonable set of shield parameters. Based on the deformation of built tunnel, it is found that the displacement of existing tunnel is negligible when the cross tunneling is more than 20 meters away. The shield process had a major impact on the left side of the existing tunnel. The results indicate that the displacement process of the interaction of existing tunnel and new tunnel can be divided into five phases.

Key words: shield tunneling below the existing tunnel, shield driving parameter, tunnel monitoring, deformation of existing tunnel

CLC Number: 

  • TU 443

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